It's wasn't clear as afternoon turned to evening Tuesday in Kenya whether the four-day-old crisis was finally almost over or likely to drag on.

There was also ominous news from The Associated Press, which reports being told that "Nairobi's city morgue is preparing for the arrival of a large number of bodies of people killed in the Westgate Mall terrorist attack."

The wire service adds that:

"Morgue employees were dressed in smocks early Tuesday, though no bodies had been delivered. The official death toll from the mall attack stood at 62. Most of those bodies were already taken to the morgue, either directly or from hospitals."

From Nairobi, NPR's Gregory Warner said on Morning Edition that it seems almost certain that the death toll will be rising. He also reported that authorities believe a few American and British nationals may have been among the al-Shabab militants responsible for the attack.

Kenyan Foreign Minister Amina Mohammed has told the PBS NewsHour that the foreigners may include the so-called White Widow: Samantha Lewthwaite of Great Britain, who moved to Kenya in 2007 with her three children. She is, the BBC adds, "the widow of one of the men who carried out attacks on London's transport system on 7 July 2005."